<script lang="ts" setup name="XtxCarousel">
import { IBannerItem } from '@/types/data'
import { onMounted, ref } from 'vue';
const props = withDefaults(defineProps<{
  sildes: IBannerItem[]
  autoPlay?: boolean
  duration?: number
}>(), {
  autoPlay: false,
  duration: 3000
})
// 控制下标
const active = ref<number>(0)
// 向左
const left = (): void => {
  if (active.value <= 0) {
    active.value = props.sildes.length - 1
  } else {
    active.value--
  }
}
// 向右
const right = (): void => {
  if (active.value >= props.sildes.length - 1) {
    active.value = 0
  } else {
    active.value++
  }
}
// 点击原点
const dian = (d: number) => {
  active.value = d
}
let timer: any = null
// 开始
const ok = (): void => {
  timer = setInterval(() => {
    if (props.autoPlay) {
      active.value++
      if (active.value == props.sildes.length) {
        active.value = 0
      }
    }
  }, props.duration)
}
// 暂停
const stop = (): void => {
  clearInterval(timer)
}
onMounted(() => {
  ok()
})
</script>

<template>
  <div class="xtx-carousel" @mouseenter="stop" @mouseleave="ok">
    <ul class="carousel-body">
      <li class="carousel-item" :class="{ fade: index == active }" v-for="(item, index) in sildes">
        <RouterLink :to="item.hrefUrl">
          <img :src="item.imgUrl" alt="" />
        </RouterLink>
      </li>
    </ul>
    <a @click="left" href="javascript:;" class="carousel-btn prev"><i class="iconfont icon-angle-left"></i></a>
    <a @click="right" href="javascript:;" class="carousel-btn next"><i class="iconfont icon-angle-right"></i></a>
    <div class="carousel-indicator">
      <span @click="dian(d)" v-for="(i, d) in sildes" :class="{ active: active == d }"></span>
    </div>
  </div>
</template>

<style scoped lang="less">
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 300px;
  min-height: 150px;
  position: relative;

  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }

    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;

      &.fade {
        opacity: 1;
        z-index: 1;
      }

      img {
        width: 100%;
        height: 100%;
      }
    }

    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;

      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;

        ~span {
          margin-left: 12px;
        }

        &.active {
          background: #fff;
        }
      }
    }

    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;

      &.prev {
        left: 20px;
      }

      &.next {
        right: 20px;
      }
    }
  }

  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
}
</style>